A) If \[{{n}_{1}}={{n}_{2}}={{n}_{g}}\]
B) If \[{{n}_{1}}={{n}_{2}}\] and \[{{n}_{1}}<{{n}_{g}}\]
C) If \[{{n}_{1}}={{n}_{2}}\] and \[{{n}_{1}}>{{n}_{g}}\]
D) Under no circumstances
Correct Answer: C
Solution :
If \[{{n}_{l}}>{{n}_{g}}\] then the lens will be in denser medium. Hence its nature will change and the convex lens will behave like a concave lens.
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